#include <stdio.h>

class Bar
{
    public:
    Bar() { printf ("Bar::Bar\n"); }
    ~Bar() { printf ("Bar::~Bar\n"); }
    Bar(const Bar&) { printf("Bar::Bar(const Bar&)\n"); }
    void baz() const { printf("Bar::Baz\n"); }
};

class Foo
{
    Bar bar;

    public:
    Bar& getBar () { return bar; }
    Foo() { }
};

int main()
{
    printf("This is safe:\n");
    {
        Foo *x = new Foo();
        const Bar y = x->getBar();
        delete x;
        y.baz();
    }
    printf("\nThis is a disaster:\n");
    {
        Foo *x = new Foo();
        const Bar& y = x->getBar();
        delete x;
        y.baz();
    }
    return 0;
}